Sensitivity analysis of the Aquacrop and SAFYE crop models for the assessment of water limited winter wheat yield in regional scale applications

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dc.contributor.authorSilvestro, Paolo Cosmo-
dc.contributor.authorPignatti, Stefano-
dc.contributor.authorYang, Hao-
dc.contributor.authoret al.-
dc.contributor.editorLoiselle, Steven Arthur- the Authorsen_US
dc.identifier.citationPLoS Oneen_US
dc.description.abstractProcess-based models can be usefully employed for the assessment of field and regional-scale impact of drought on crop yields. However, in many instances, especially when they are used at the regional scale, it is necessary to identify the parameters and input variables that most influence the outputs and to assess how their influence varies when climatic and environmental conditions change. In this work, two different crop models, able to represent yield response to water, Aquacrop and SAFYE, were compared, with the aim to quantify their complexity and plasticity through Global Sensitivity Analysis (GSA), using Morris and EFAST (Extended Fourier Amplitude Sensitivity Test) techniques, for moderate to strong water limited climate scenarios. Although the rankings of the sensitivity indices was influenced by the scenarios used, the correlation among the rankings, higher for SAFYE than for Aquacrop, assessed by the top-down correlation coefficient (TDCC), revealed clear patterns. Parameters and input variables related to phenology and to water stress physiological processes were found to be the most influential for Aquacrop. For SAFYE, it was found that the water stress could be inferred indirectly from the processes regulating leaf growth, described in the original SAFY model. SAFYE has a lower complexity and plasticity than Aquacrop, making it more suitable to less data demanding regional scale applications, in case the only objective is the assessment of crop yield and no detailed information is sought on the mechanisms of the stress factors affecting its limitations.en_US
dc.description.sponsorshipEuropean Space Agencyen_US
dc.rightsThis is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en_US
dc.subjectCrop yieldsen_US
dc.subjectGlobal Sensitivity Analysis (GSA)en_US
dc.subjectEFAST (Extended Fourier Amplitude Sensitivity Test)en_US
dc.subjectClimate scenariosen_US
dc.titleSensitivity analysis of the Aquacrop and SAFYE crop models for the assessment of water limited winter wheat yield in regional scale applicationsen_US
dc.typeJournal Articleen_US
dc.statusPeer revieweden_US
dc.neeo.contributorSilvestro|Paolo Cosmo|aut|-
dc.neeo.contributoret al.||aut|-
dc.neeo.contributorLoiselle|Steven Arthur|edt|-
dc.description.othersponsorshipAgreement on scientific cooperation between Consiglio Nazionale delle Ricerche and China Academy of Science 2014-2016en_US
dc.description.othersponsorshipChinese National Science and Technology Support Programen_US
dc.description.othersponsorshipChinese State Key Basic Projecten_US
dc.description.othersponsorshipUniversity of Tusciaen_US
dc.identifier.grantid10448 "Farmland Drought"-
item.fulltextWith Fulltext-
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